Constraints, Criteria & Standards

Constraints

  • Cost-effective and fits within the city budget

  • Physical land constraints & pre-existing structures (water table, soil type, shore, buildings).

  • Sea level rise

  • Climate - local weather patterns, suitable wetland flora.

  • Synergy with existing green infrastructure

  • Net benefit to the environment and city

  • Maintains recreational value



Criteria

  • Implementable within 5 years

  • Maintain parking lot capacity at 394 spaces

  • Shoreline structure can withstand runoff from outfall during a 25-year 24-hour storm event

  • Viable by 2040 given NOAA Int-High projected sea-level rise of 1-1.5 ft from 2020 to 2040

Standards

  1. Virginia Institute of Marine Science Shoreline Design Guidelines for Shore Protection in Virginia’s Estuarine Environments.

Contains standards for site evaluation and design guidelines for marshes, sills, marsh toe revetments, and breakwaters.


  1. Norfolk Stormwater Design and Construction Manual

    1. 5.3.7 Stream Channel Erosion and Flooding Prevention

    2. 5.3.8 Design Storms and Hydraulic Methods

Contains information on the minimum design storm (10 yr 24 hr) and the appropriate method to calculate peak stormwater runoff (Rational Method)


  1. 9VAC25-840-40. Minimum standards.

Contains minimum standards for stormwater structures, including the design storm to be used.